As far as Blue Tongue Skinks being "easier" then Leopard Geckos, I would have to disagree. Though they are, in my opinion, more rewarding due to their "heft" and great personalities (not that Leo's don't have them), they are more like puppies!

It is NOT normal for a skink to be sedentary and not move around unless they are not in the correct environment, i.e not warm enough, not enough light (UVA/UVB), not enough food, etc. Blue Tongues DO need UVB light either from regular jaunts in the yard in the real sun or via a UVB light (though some may argue that it is not required, most seem to agree) such as the Reptisun 8.0, etc. If your skink has a basking spot that is at about 100F and ambient cool side of about 75F, then they should be pretty active throughout the day, especially an older animal like yours seems to be...UNLESS they have been in brumation (a hibernation type of activity that Blueys go into when there is cold weather or a lack of food or water). There is a good thread at the top of the topics called "Brumation 101" to read up on that and some info in the caresheet.
A good combination of lights for a blue tongue skink is a simple incandescent for Heat (wattage depends on many factors to achieve the 100F temps, including height, ambient temp, etc.) and a flourecent UVB bulb such as the Reptisun 8.0.
About the substrate, newspaper isn't usually very good...Blue Tongues like to burrow and bury themselves so they need something they can dig in such as Aspen or Carefresh bedding.
Unfortunately your Bluey will need more lighting and "care" then the Leopard Gecko as the geckos are nocturnal and don't really require UVB lighting. Blue Tongues also require more care in preparing food, they need green leafy foods, veggies, fruits, and similar items for about 75% of their food items and snails, roaches, cooked meat, high quality cat/dog food, etc. for 25% of their diet. You can find BETTER, more complete information in the caresheet.
What kind of Blue Tongue Skink do you have? Can you post pictures?